Mortal Kombat 4 Cheats (GameBoy Color)

To activate a cheat, enter its code at the code screen. 
  Effect: Code
  25% life (CPU): 00-07-07
  25% life (Player 1): 70-70-00
  50% life (CPU): 00-00-33
  50% life (Player 1): 03-30-00
  Big heads: 32-13-21
  Dark Kombat: 68-84-22
  Disable throws: 10-01-00
  Disable max damage: 01-00-10
  Disable throws and max damage: 11-01-10
  Explosive Kombat: 05-00-50
  Multiple weapons: 55-55-55
  No blocking: 02-00-20
  Noob Saibot mode: 01-20-12
  Programmer's message: 98-76-66
  Programmer's message: 12-39-26
  Psycho Kombat: 98-51-25
  Random weapon appears in match: 11-11-11
  Randper(Random Person)Kombat: 33-33-33
  Silent Kombat: 66-66-66
  Start with random weapon: 22-22-22
  Switcharoo: 46-04-60
  Weapons never dropped: 00-20-02
  Win with one hit: 12-31-23
  Fight Reptile: 20-52-05 
  Play as Reptile: 19-22-34